JP5967788B1 - Freezer for faucet - Google Patents

Abstract

An anti-freezing device is provided that can prevent freezing in a severe winter season with a simple configuration by adopting a solid spool that moves within an opening / closing shaft, and can stably operate the spool. Provide a faucet.
By differentiating the inner diameters of a first spring 23a and a second spring 23b, each pressing force on a spool 22 is applied at different positions, and only these two first and second springs are applied. The spool 22 was activated by
[Selection] Figure 3

Description

  The present invention relates to an antifreezing device for a faucet, and more particularly to an antifreezing device capable of preventing freezing in a severe winter season.

  Watering faucets installed in the garden can be exposed to strong cold air in the severe winter season, so there is a phenomenon that the water in the water pipe connected to it freezes and the water pipe bursts. Well known. In order to prevent the water pipe from rupturing based on this external water faucet, it is also known that it is very effective to flow a small amount of water in the water pipe before the tap water is about to freeze.

  In order to send a little tap water before freezing, a “device” that performs such a function is provided in the faucet, but the most important of the devices is normally It is a “valve” that is closed and opened only in the severe winter season. A simple and representative power source for opening and closing the valve is a “shape memory alloy” first, and a “thermostat” called a wax element.

  An anti-freezing faucet employing “shape memory alloy” has been proposed in Patent Document 1 and the like, and an anti-freezing faucet employing “thermostat” has been proposed in Patent Document 2 and the like, each having a predetermined anti-freezing function. It is thought that it demonstrates.

Japanese Utility Model Publication No.59-58264 Japanese Patent Publication No. 4-9947

  In the “water faucet” proposed in Patent Document 1, as shown in FIG. 5, normal water discharge and water stoppage are caused by the packing 8 provided at the lower end of the handle 5 coming into contact with and separating from the valve seat 9. However, the communication passage 12 forming a small water flow for preventing freezing is opened and closed by a pad 15 pressed by a spring 16 formed of a shape memory alloy. The water passage 12 is formed in the valve body 7 itself, and is rotated together with the pad 15 by the opening / closing operation of the handle 5 at the normal time.

  Then, in the faucet of this patent document 1, the pressure in the water pipe (primary side) to which the faucet is connected is always applied to the pad 15 at the time of water stoppage at a normal time. If the pressing force of the spring 16 made of an alloy is insufficient before the tap water freezes, unnecessary water leakage will occur. Moreover, in the faucet of this patent document 1, the operation | work considered to be very difficult of forming the water flow path 12 in the valve body 7 is required, and the valve body 7 itself becomes very expensive. It is thought that there is.

  On the other hand, the water faucet shown in FIG. 6 (a), which is a conventional example in Patent Document 2, has a desired function with three parts of a thermostat, a spring 42, and a spring 52 whose expansion and contraction changes depending on temperature and pressing force. The pressing force or the contraction rate of the thermostat, the spring 42, and the spring 52, which are these three parts, must be set for the entire three parts. This also applies to the faucet shown in FIG. 6B, which is a technique proposed in the patent document, and the pressing force or contraction rate of the three components of the spring 44, the thermostat, and the spring 52 is 3. Must be set or adjusted for the entire part.

  As in the technique described in Patent Document 2, it can be easily imagined that it is quite difficult to set the pressing force or shrinkage rate of three parts for all three parts if there are three things that change. Furthermore, if at least one of the springs is formed of “shape memory alloy”, it is considerably difficult to balance the entire three parts.

  Therefore, the present inventors have conducted various studies on how to prevent bursting of water pipes in the severe winter season with a single spring formed of a shape memory alloy. He realized that good results could be obtained by using a solid spool moving in the shaft, and the present invention was completed.

  That is, the object of the present invention is to employ a solid spool that moves within the opening and closing shaft, thereby preventing freezing in the severe winter season with a simple configuration and allowing the spool to operate stably. An object of the present invention is to provide an antifreezing device for a faucet that can be used.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the best mode described below.
“A faucet that can stop or discharge water by advancing and retracting the first valve body 13 provided below the opening / closing shaft 12 rotated by the handle 11 with respect to the water passage hole 15 provided in the faucet body 10. 100 is a freeze preventer 20 that is provided at the lower end of the opening and closing shaft 12 to prevent freezing of tap water,
The antifreezing device 20 is attached to the lower end of the opening / closing shaft 12 and has a second storage portion 21d communicating with the first storage portion 12c in the opening / closing shaft 12, and the first valve body 13 is prevented from being attached to the lower surface. a main body 21, is vertically movable accommodated in the first accommodating portion 12c and the second housing portion 21d, the center the performing guidance at the time of vertical movement the outer surface is inscribed in the first housing portion 12c larger diameter portion 22a And a shape memory alloy which is disposed outside the small diameter portions 22b of the spool 22 and contracts when the ambient temperature is close to 0 ° C. and loses the function of the compression spring. first Sprint grayed 23a made of, and a second spring 23b is helical compression spring, the second valve body attached to the lower end of the spool 22, to open and close the formed in the locking unit 21 auxiliary water flow holes 21a 24 And Configure and,
By varying the respective inner diameter of the first spring 23a and a second spring 23b, the first spring when the together when the pressing force to the spool 22 is so applied to the different positions, was near ambient temperature 0 ℃ The antifreezing device 20 for the faucet 100 is characterized in that only the pressure force 23a is contracted to eliminate the pressing force and the spool 22 is moved upward by the pressing force of the second spring 23b.
It is.

  Here, the faucet 100 in which the freeze preventer 20 according to the first aspect is used is, as shown in FIG. 1, the first valve body 13 provided below the opening / closing shaft 12 rotated by the handle 11. Has a general configuration in which water can be stopped or discharged by advancing and retreating with respect to the water passage hole 15 provided in the faucet body 10, and the lower end of the opening / closing shaft 12 is attached to the present invention. Such an anti-freezing device 20 is provided.

  As shown in FIGS. 1 to 4, the antifreeze 20 according to the present invention is first attached to the lower end of the open / close shaft 12 and communicates with the first storage portion 12 c in the open / close shaft 12. The first main body 13 includes a prevention main body 21 that is attached to the lower surface. The antifreezing device 20 is housed in the first housing portion 12c and the second housing portion 21d so as to be movable up and down, and includes a spool 22 including a central large diameter portion 22a and upper and lower small diameter portions 22b. A first spring 23a and a second spring 23b disposed on the outer side of each small-diameter portion 22b of the spool 22; and opening and closing of an auxiliary water passage hole 21a formed in the prevention body 21 and attached to the lower end of the spool 22. The 2nd valve body 24 which performs is provided.

  In this anti-freezing device 20, the inner diameters of the first spring 23 a and the second spring 23 b are made different so that the pressing forces on the spool 22 are applied at different positions, and the two first The spool 22 is operated only by the second spring. In the freeze preventer 20 of the embodiment described later, either the first spring 23a or the second spring 23b is moved upward in the drawing before the tap water in the faucet body 10 is frozen. It is made of a shape memory alloy that exerts an urging force.

  In the faucet 100 having the antifreezing device 20 configured as described above, the large-diameter portion 22a of the spool 22 is in sliding contact with the first storage portion 12c of the open / close shaft 12, and the first storage portion 12c has The spool 22 moves up and down as it is, but the spool 22 is easy to “sag” when it moves up and down in the first storage portion 12 c of the opening / closing shaft 12. However, the spool 22 is different from each other in the inner diameters of the first spring 23a and the second spring 23b supported by the small diameter portions 22b integrally formed on the upper and lower sides of the large diameter portion 22a. Since each pressing force of 23 a and the second spring 23 b is applied to the upper and lower surfaces of the large diameter portion 22 a constituting the spool 22 at different positions, the spool 22 will not be “twisted”. That is, the spool 22 constituting the freeze preventer 20 can move up and down in the first storage portion 12c of the opening / closing shaft 12 in a stable state.

  Moreover, even if the spool 22 has a second valve body 24 to be described later at the lower end, the spool 22 has a simple configuration in which the small diameter portion 22b is integrated above and below the large diameter portion 22a. It can be done at no cost. In addition, the upper and lower surfaces of the large-diameter portion 22a serve as locking portions for the first spring 23a and the second spring 23b, and the small-diameter portions 22b themselves serve as attachment guide portions for the first spring 23a and the second spring 23b. The assembly of the first spring 23a and the second spring 23b into the main body 21 of the spool 22 is facilitated.

  Since the spool 22 is a “rigid” in which the small-diameter portion 22b is integrated on both sides of the large-diameter portion 22a, this freezing can be achieved only by adjusting the pressing force between the first spring 23a and the second spring 23b. The anti-freezing function of the preventer 20 can be sufficiently exhibited. In other words, the freeze preventer 20 according to the present invention has a simple configuration that does not require adjustment between the three components as in the technique of Patent Document 2.

In particular, the large-diameter portion 22a constituting the spool 22 maintains the vertical position within the first storage portion 12c of the opening / closing shaft 12 by the outer surface being inscribed in the first storage portion 12c. The spool 22 serves as a guide when the spool 22 is moved up and down and as a spring receiver for the first spring 23a and the second spring 23b. Each small-diameter portion 22b is a portion inserted into each first spring 23a and second spring 23b, and maintains the installation position of each first spring 23a and second spring 23b.

The first spring 23a and the second spring 23b assembled to the spool 22 are so-called helical compression springs, but the first spring 23a on the upper side in the drawing is made of a shape memory alloy, and the ambient temperature When the temperature reaches around 0 ° C., it contracts and the function of the compression spring is lost. That is, in the freeze preventer 20, when the ambient temperature is around 0 ° C., only the first spring 23a contracts and the pressing force disappears, and the spool 22 is moved upward by the pressing force of the second spring 23b. .

  Now, in the faucet 100 provided with the freeze preventer 20 configured as described above, the first valve body 13 and the second valve body 24 are in the “normal water stop state” shown in FIG. 1 and FIG. The “freezing prevention state” shown in FIGS. 3 and 4 is exhibited. Next, the function of the freeze preventer 20 according to the present invention that the water faucet 100 has according to each of these states will be described in the following order.

(Normal water stoppage)
FIG. 1 shows a faucet 100 that is normally stopped at a normal time when freezing does not occur, and FIG. 2 (a) shows the state of the freeze preventer 20 at that time. During the normal water stop, the first valve body 13 provided at the lower end of the handle 11 in which the first valve body 13 of the faucet 100 is turned to the water stop state is the faucet body of the faucet 100. 10 is in contact with a first valve seat 14 formed in the interior of the water faucet body 10, and the water passage hole 15 communicating the primary side and the secondary side of the faucet body 10 is closed.

  And, as exemplified in the embodiments described later, the first spring 23a that is larger in elasticity than the second spring 23b and contracts when the outside air temperature becomes lower than zero degrees is in a non-contracted state. The spool 22 is urged downward in the figure by the difference in resilience between the first spring 23a and the second spring 23b. As a result, the second valve body 24 provided at the lower end of the spool 22 has the second valve body 24 around the auxiliary water passage hole 21a provided in the prevention main body 21 of the freeze preventer 20, as shown in FIG. Since the two valve seats 21f are in contact with each other, the auxiliary water passage hole 21a is in a closed state. As a result of the above, as shown by the arrow in FIG. 1, in the faucet 100, tap water from the primary side closes the water passage hole 15 and the auxiliary water passage hole 21a in the faucet body 10. It is stopped by the first valve body 13 and the second valve body 24, and water is normally stopped.

(Anti-freezing state)
3 and 4, the antifreezing device 20 of the faucet 100 reacts, and tap water from the primary side of the faucet body 10 is slightly discharged from the auxiliary water passage hole 21 a provided in the prevention body 21. The faucet 100 and the freeze protector 20 are shown in a frozen state, that is, in a freeze-prevented state. In this case, since the first spring 23a that contracts when the outside air temperature becomes lower than zero degrees is in a contracted state, the spool 22 is moved upward in the drawing by the difference in the resilience between the first spring 23a and the second spring 23b. Is being energized.

  As a result of the above, the second valve body 24 provided at the lower end of the spool 22 has a second valve body 24 around the auxiliary water passage hole 21a provided in the prevention body 21 of the freeze preventer 20, as shown in FIGS. Since the two valve seats 21f are separated upward, the auxiliary water passage hole 21a is in an open state. For this reason, as shown by the arrow in FIG. 3, in the faucet body 10 of the faucet 100, tap water from the primary side flows out to the secondary side from the open auxiliary water passage hole 21a, and it is a severe winter. Water discharge that prevents freezing in the season is a little addressed.

  Accordingly, the antifreezing device 20 according to the first aspect includes a solid spool 22 that moves within the opening / closing shaft 12 of the faucet 100, and first springs 23a and second springs 23a and 23b that are disposed above and below the spool 22 and have different diameters. By adopting the spring 23b, the spool 22 can be stably operated, and freezing prevention in the severe winter season can be performed with a simple configuration.

  Further, the antifreezing device 20 according to the first aspect includes a first valve body 13 (generally called a water stop piece) provided at the lower end of the opening / closing shaft 12 of the existing faucet 100 together with the opening / closing shaft 12. It can be applied as a replacement part to be replaced, and the existing faucet 100 having no freeze prevention function can be provided with a freeze prevention function.

Moreover, in order to solve the above-mentioned subject, the means which the invention which concerns on Claim 2 took about the freeze preventer 20 of the said Claim 1,
“The second valve body 24 is screwed to the lower end of the spool 22 and is attached by the second valve body mounting tool 25 having an exposure opening 25a smaller than the outer shape of the second valve body 24, and is exposed from the exposure opening 25a. That part of the second valve body 24 faces the auxiliary water inlet 21a provided in the prevention main body 21 "
It is.

  The antifreezing device 20 according to claim 2 attaches the second valve body 24 to the lower end of the spool 22 by the second valve body attachment tool 25 having an exposed opening 25 a smaller than the outer shape of the second valve body 24. It is a thing. In other words, the second valve body 24 of the antifreeze device 20 can be easily attached to the lower end of the spool 22 using the second valve body attachment 25, and conversely, the second valve body attachment If 25 is removed, the replacement can be performed easily.

  In other words, the second valve body 24 that closes the auxiliary water passage hole 21a of the freeze preventer 20 has a very long time in the closed state compared to the open state time at the time of freezing prevention. Even if it is made of a highly elastic synthetic rubber, it is easily deformed. If this second valve body 24 is used in a deformed state for a long period of time, it will cause water leakage even during normal times, so it may be necessary to replace it. The replacement work of the second valve body 24 can be easily performed only by removing the valve body mounting tool 25 from the spool 22.

  Therefore, the antifreezing device 20 according to the second aspect of the invention exhibits the same function as that of the first aspect of the invention, and can easily replace the second valve body 24.

As described above, in the present invention,
“A faucet that can stop or discharge water by advancing and retracting the first valve body 13 provided below the opening / closing shaft 12 rotated by the handle 11 with respect to the water passage hole 15 provided in the faucet body 10. 100 is a freeze preventer 20 that is provided at the lower end of the opening and closing shaft 12 to prevent freezing of tap water,
The antifreezing device 20 is attached to the lower end of the opening / closing shaft 12 and has a second storage portion 21d communicating with the first storage portion 12c in the opening / closing shaft 12, and the first valve body 13 is prevented from being attached to the lower surface. a main body 21, is vertically movable accommodated in the first accommodating portion 12c and the second housing portion 21d, the center the performing guidance at the time of vertical movement the outer surface is inscribed in the first housing portion 12c larger diameter portion 22a And a shape memory alloy which is disposed outside the small diameter portions 22b of the spool 22 and contracts when the ambient temperature is close to 0 ° C. and loses the function of the compression spring. first Sprint grayed 23a made of, and a second spring 23b is helical compression spring, the second valve body attached to the lower end of the spool 22, to open and close the formed in the locking unit 21 auxiliary water flow holes 21a 24 And Configure and,
By varying the respective inner diameter of the first spring 23a and a second spring 23b, the first spring when the together when the pressing force to the spool 22 is so applied to the different positions, was near ambient temperature 0 ℃ Only the pressure force 23a was contracted to eliminate the pressing force, and the spool 22 was moved upward by the pressing force of the second spring 23b. "
The main feature of the structure is that, by adopting a solid spool 22 that moves within the opening and closing shaft 12, it is possible to prevent freezing in the severe winter season with a simple structure and to stabilize the spool 22 It is possible to provide an antifreeze 20 that can be actuated automatically.

It is sectional drawing which shows the mode at the time of the normal water stop of the faucet 100 to which the freeze preventer 20 which concerns on this invention is applied. The state at the time of the normal water stop of the freeze preventive device 20 is shown, (a) is sectional drawing, (b) is the partial expanded sectional view which looked at the 2nd valve body 24 as the center. It is sectional drawing in which the 2nd valve body 24 of the same freeze preventer 20 exists in a freeze prevention state. It is sectional drawing which shows the freeze preventer 20 in the state of FIG. It is sectional drawing which shows the technique currently proposed by patent document 1. FIG. The technique shown by patent document 2 is shown, (a) is sectional drawing which shows the prior art of the said patent document 2, (b) is sectional drawing which shows the technique of the said patent document 2. FIG.

  Next, the invention according to each claim configured as described above will be described with reference to the freeze protector 20 according to the embodiment shown in the drawings. FIG. 1 shows a faucet 100 in a normally water-stopped state. FIG. 2 shows an antifreezing device 20 according to the present invention that is used in the faucet 100 and in which the second valve body 24 is normally in a water stop state. 3 shows the faucet 100 in the freeze-prevented state, and FIG. 4 shows the freeze preventer 20 that constitutes the faucet 100 and in which the second valve body 24 is in the freeze-prevented state. It is shown.

  As shown in FIGS. 1 and 3, the faucet 100 in this embodiment has the first valve body 13 provided below the opening / closing shaft 12 rotated by the handle 11 in the faucet body 10. Water stop or water discharge can be performed by advancing and retracting the first valve seat 14 around the provided water passage hole 15. The faucet 100 is provided with a freeze preventer 20 at the lower end of the opening / closing shaft 12 to prevent the water pipe from freezing in severe winter.

  The opening / closing shaft 12 of the faucet 100 is attached to the faucet body 10 located immediately above the water passage hole 15 by an outer attachment portion 12a formed at the lower end portion thereof, and is formed inside the outer attachment portion 12a. The anti-freezing device 20 to be described later can be attached by the attachment portion 21c formed on the inner attachment portion 12b. Further, in the opening / closing shaft 12, a first storage portion 12 c having an axis that coincides with the axis of the opening / closing shaft 12 is formed. The first storage portion 12 c is attached to the lower end of the opening / closing shaft 12. It communicates coaxially with the second storage part 21d in the freeze preventer 20 to be provided.

  Further, as shown in FIG. 2A, an outer mounting portion 12a is formed on the lower outer side of the opening / closing shaft 12, and this outer mounting portion 12a is screwed into the opening of the faucet body 10. Thus, when the opening / closing shaft 12 is rotated by the handle 11, the opening / closing shaft 12 can be screwed into and retracted from the faucet body 10. Further, as shown in FIG. 2A, an inner mounting portion 12b is formed in the lower portion of the opening / closing shaft 12, and a prevention main body 21 of an antifreeze 20 described later is provided on the inner mounting portion 12b. The prevention main body 21 is integrated with the opening / closing shaft 12 by screwing. And the prevention main body 21 advances / retreats with respect to the faucet main body 10 with the advance / retreat of the opening / closing shaft 12.

  Here, as shown in FIG. 1, the first valve body 13 described above is attached to the lower end portion of the opening / closing shaft 12 via the prevention main body 21 of the antifreezing device 20, and is positioned on the lower side. The water passage hole 15 is closed when it comes into contact with the first valve seat 14. Further, as shown in FIG. 2B, an auxiliary water passage 21a in the vertical direction formed in the prevention main body 21 of the freeze preventer 20 is formed at the center of the first valve body 13. If the second valve body 24, which will be described later, that closed the auxiliary water passage hole 21a is separated, even if the first valve body 13 is in the closed state, as shown in FIG. The side and the secondary side are communicated to form a slight water flow indicated by an arrow in FIG.

  As shown in FIG. 2A, the freeze preventer 20 is attached to the lower end portion of the opening / closing shaft 12 with the first valve body 13 described above attached to the lower surface and an attachment portion 21c formed on the outer periphery of the upper portion. A spool 22 accommodated in the prevention main body 21, a second storage portion 21 d provided in the prevention main body 21, and a first storage portion 12 c formed on the opening / closing shaft 12, and the spool 22 The first spring 23 a and the second spring 23 b disposed above and below the second spring body 24, and the second valve body 24 attached to the lower end of the spool 22 by the second valve body mounting tool 25.

  As described above, the prevention main body 21 has the auxiliary water passage hole 21a provided at the center of the lower portion. The upper end of the auxiliary water passage hole 21a in the prevention main body 21 is shown in FIGS. Thus, the second valve seat 21f is formed, and around the upper side of the second valve seat 21f, water discharged from the auxiliary water passage hole 21a is discharged to the secondary side of the faucet body 10. A discharge port 21b is formed. Above the discharge port 21b is a second storage portion 21d for storing the lower end portion of the spool 22 and the lower portion of the second spring 23b, and the lower end of the second spring 23b is formed in a part of the discharge port 21b. A spring receiver 21e is provided.

  For example, as shown in FIGS. 3 and 4, the spool 22 is stored between the first storage portion 12 c of the faucet body 10 and the second storage portion 21 d on the antifreeze device 20 side. A large-diameter portion 22a whose outer surface is inscribed in the first storage portion 12c is formed integrally with both the upper and lower sides of the large-diameter portion 22a, and the first surface is between the first storage portion 12c and the second storage portion 21d. The spring 23a and the second spring 23b include a small-diameter portion 22b that forms a space in which the spring 23a and the second spring 23b can expand and contract in a natural state. The spool 22 composed of the large-diameter portion 22a and the small-diameter portion 22b is integrally formed of, for example, metal, and the spool 22 itself has no temperature change.

  The outer diameter of the large-diameter portion 22a constituting the spool 22 is inscribed in the first storage portion 12c, so that the vertical position is maintained in the first storage portion 12c of the opening / closing shaft 12. The spool 22 serves as a guide when the spool 22 moves up and down and serves as a spring receiver for the first spring 23a and the second spring 23b. Each small-diameter portion 22b is a portion inserted into each first spring 23a and second spring 23b, and maintains the installation position of each first spring 23a and second spring 23b.

  The first spring 23a and the second spring 23b assembled to the spool 22 are so-called helical compression springs, and one of them is formed of a shape memory alloy. In the faucet 100 according to the present embodiment, the first spring 23a on the upper side in the figure is made of a shape memory alloy, and contracts when the ambient temperature is around 0 ° C., and the function of the compression spring is lost. is there. That is, in the freeze preventer 20, when the ambient temperature is around 0 ° C., only the first spring 23a contracts and the pressing force disappears, and the spool 22 is moved upward by the pressing force of the second spring 23b. .

  Further, the outer shape of the first spring 23a and the second spring 23b assembled to the spool 22 is different. In the present embodiment, as shown in FIGS. 1 to 4, the outer shape of the first spring 23a is made smaller than that of the second spring 23b. Of course, both ends of the first spring 23a and the second spring 23b have to be locked to something. In this embodiment, the upper and lower ends of the first spring 23a are locked in the opening / closing shaft 12. The upper end of the first storage portion 12c and the upper surface of the large-diameter portion 22a of the spool 22 are engaged with the upper and lower ends of the second spring 23b by the spring receiver 21e in the prevention body 21 and the large diameter of the spool 22. And the lower surface of the portion 22a. Accordingly, the first spring 23a and the second spring 23b in the present embodiment are locked at different locations on the portion near the center of the upper surface of the large diameter portion 22a and the peripheral portion on the lower surface of the large diameter portion 22a. Therefore, each pressing force to the large diameter portion 22a is applied so as not to incline the large diameter portion 22a, that is, the spool 22 with respect to the axial direction.

  The second valve body 24 is attached to the lower surface of the lower small diameter portion 22b of the spool 22 by a second valve body mounting tool 25 as shown in FIG. The second valve body mounting tool 25 is a “lid” screwed to the lower end portion of the small diameter portion 22b, and is attached to the spool 22 in a state where the second valve body 24 is wrapped. An exposure opening 25a is formed. The exposed opening 25a is provided so that the lower surface of the center of the second valve body 24 encased inside faces downward, and the second valve body 24 is directly inserted into the auxiliary water passage hole 21a formed in the prevention main body 21. It is made to contact | abut.

  Since the second valve body 24 is always in contact with the second valve seat 21f so as to close the auxiliary water passage hole 21a of the prevention main body 21 except in the anti-freezing state shown in FIG. -Deformation may occur, but in that case it is difficult to completely stop water. The second valve body 24 that has changed or deformed over time may be replaced with a new second valve body 24 after removing the second valve body mounting tool 25 enclosing the second valve body 24. The new second valve body 24 can be easily attached to the lower end of the spool 22 by using the second valve body mounting tool 25.

DESCRIPTION OF SYMBOLS 100 Water faucet 10 Water faucet body 11 Handle 12 Opening / closing axis 12a Outer attachment part 12b Inner attachment part 12c First storage part 13 First valve body 14 First valve seat 15 Water flow hole 20 Antifreezing device 21 Prevention main body 21a Auxiliary water flow Hole 21b Discharge port 21c Mounting portion 21d Second storage portion 21e Spring receiver 21f Second valve seat 22 Spool 22a Large diameter portion 22b Small diameter portion 23a First spring 23b Second spring 24 Second valve body 25 Second valve body mounting tool 25a Exposure opening

Claims (2)

The first valve body provided below the opening / closing shaft rotated by the handle is used for a faucet that can stop or discharge water by advancing and retreating with respect to a water passage hole provided in the faucet body. An anti-freezing device provided at the lower end of the shaft to prevent freezing of tap water,
The antifreezing device is attached to the lower end of the opening and closing shaft, and has a second storage portion that communicates with the first storage portion in the opening and closing shaft, and the prevention main body to which the first valve body is attached to the lower surface; is vertically movable accommodated in the first housing portion and second housing portion, the large diameter portion of the center the outer surface performs guidance during vertical movement inscribed in the first housing portion and the small diameter portion of the upper and lower a spool made of, are arranged on the outside of the small diameter portion of the spool, first Sprint grayed made of a shape memory alloy which functions of the compression spring to contract the ambient temperature is near 0 ℃ disappears, and helical compression A second spring that is a spring, and a second valve body that is attached to the lower end of the spool and opens and closes the auxiliary water passage hole formed in the prevention body,
By varying the respective internal diameter of the first spring and the second spring, in together when the pressing force to the spool to take a different position, the first spring when the ambient temperature is near 0 ℃ The anti-freezing device for water faucets , wherein the spool is moved upward by the pressing force of the second spring .   The second valve body is screwed into the lower end of the spool, is attached by a second valve body mounting tool having an exposure opening smaller than the outer shape of the second valve body, and is exposed from the exposure opening. 2. The anti-freezing device for a faucet according to claim 1, wherein a part of the valve body faces an auxiliary water passage provided in the prevention main body.

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